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Finding the Fourth Proportional to 61,130.52, 91,665.54 and 21,681.72

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Solution

The fourth proportional to 61,130.52, 91,665.54 and 21,681.72 is: 32,511.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,130.52 : 91,665.54 = 21,681.72 : x
  2. Step 2: Convert to fraction form
    61,130.52/91,665.54 = 21,681.72/x
  3. Step 3: Cross multiply
    61,130.52x = 91,665.54 × 21,681.72
  4. Step 4: Simplify right side
    61,130.52x = 1,987,466,571.93
  5. Step 5: Solve for x
    x = 1,987,466,571.93/61,130.52
  6. Step 6: Final answer
    x = 32,511.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.